Pump valve



March 9, 1943. w. P. VALENTINE PUMP VALVE Filed May 21, 1940 PatentedMar. 9, 1943 UNITED STATES PATENT OFFICE PUMB VALVE Warren P. Valentine,Yeadon, Pa. Application May 21, 1940, Serial No. 336,349

7 Claims.

ring portion at one port from the ring portion v at the other port.

A further purpose is to use a rubber ring as an inlet pump valve elementand optionally to clamp the ring between a cylinder head casting and acylinder block to hold the ring in place.

Further purposes will appear in the specification and in the claims.

I have preferred to illustrate my invention by two slightly variantillustrations, selecting forms which are practical, effective, simple,and inexpensive and which at the same time well illustrate theprinciples involved.

Figure 1 is a longitudinal section through a pump and driving mechanismtherefor, illustratinga desirable form of the invention.

Figure 2 is a left end elevation of the structure seen in Figure 1.

Figure 3 is a left end elevation of the cylinder block of Figure 1 whenthe head casting has been extended at l5 for threaded connection withthe piston rod. If in use where there is liquid in the chamber It astufling box l1 may be used. I show packing I8 and gland l9. It will beobvious that the detail of this mechanism is given for the purpose onlyof showing one form of overflow chamber 29 at the opposite end, the'dition.

chambers 28 and 29 being suitably connected by pipes 30 and 3| withsurge chambers not shown.

The inlet liquid passes from chamber 21 (23 or 29) during respectivelysuccessive strokes of the pump through valve openings (ports) 32 and 33respectively into arcuate chambers 23 and 35 which communicate throughthe inlet ducts 20 and 2| to opposite ends of the cylinder 6.

The arcuate inlet chambers 34 and 35 and the arcuate outlet chambers 24and 25 are arcuate enlargements at opposite sides of the cylinder ofregistering ring grooves, 36 and 31 in each end of the cylinder blockand 38 and 39 in each cylinder head. These ring grooves receive rubberring-shaped valves, here shown in the preferred form as continuousrubber rings 40 at one end and 4| at the other end.

Except at the arcuate enlargements 34 and 24, or 35 and 25 (according tothe end of the cylinder which is being considered), the walls of thesegrooves clamp the rubber ring 40 or 4|. Between these clamping pointsthe ring seats at one side of the cylinder across the discharge port,22(or 23) and at the other side of the cylinder the ring seats over theinlet port 3201' 33 within the arcuate chamber 34 or 35.

Each of the rings 40 and 4|, of rubber or other firm resilient material,acts at its end of the cylinder to cover the inlet port at one side ofthe cylinder and the outlet port at the opposite side of the cylinder,these valve portions of each ring length lying within the arcuateenlargements of the grooves. These ring portions at the inlet and outletports are valve elements to open outwardly under excess outward pressurefrom within the ports 22, 23, 32, and 33 and resiliently to close theports when the outward excess pressure ends.

The ring portions are preferably connected parts forming complete rings40 and 4|, both because of convenience of manufacture but also becauseof ease of installation in stretched con- They are held in posit on bytheir clamping fits within the registering ring groove portionsintermediate the enlargements 24, 25, 34, and 35 at the two ends.

cylinder, being axially offset to be outside of the Each ring may beapplied in slightly stretched condition to insure its closure of theport opening and to apply inlet manifold 21. Both rings open outwardlyat inlet port 32 or 33 on one side and open .outwardly at outlet port 22or-23 on the other side, different unclamped sections ofzeach ring thuscomprising inwardly retracted valve elements opening outwardly.

The arcuate enlargements at 24, 25, 34, and 25 of the cooperatinggrooves, enclosing the rings 40 and M, should be at least as long as andpreferably somewhat longer than the 'cuate ports 22, 23, 32, and 33 tobe covered. For example, as clearly seen in Figure 3, the ports may bethe same length asthe enlargements. The inlet manifold 21, showncircularalong most of the length of the cylinder 6 is arcuately enlarged at 42and respectively at the ring ports 32 and 33.

Drain taps 44 are-shown at both of the chambers 28 and 29.

I illustrate in Figure 4 that I intend to use my resilient ringinlet-and-outlet valve on pump which has the characteristics of a singleacting as well as on double acting pumps. However, the ratio of pistonrod to piston and the opening at the back make the pump of Figure 4double acting. The description of the'structure of Figures 1 to 3applies generally to Figure 4 in so far as Figure 4 applies the presentinvention, using the same letters of reference primed for the parts ofFigure 4 that correspond to the described structure of Figures 1 to 3.

The piston 5 is operated in cylinder 6' by piston rod 1, protected fromleakage by a stumng box. Channel 20' provides inlet to the cylinder,

discharge taking place through port 22 into chamber 24'.

The inlet is supplied at 21' with reserve flow through chamber 28' andpipe 30' to a surge chamber not shown.

The liquid passes from manifold 21' through port 32' to arcuate chamber34'. The ring 4|! valve is clamped between the grooves 36', 31 and thegrooves 38' and 39 and the manifold is enlarged at 42'.

The facts that the piston 5' has twice the cross sectional .area ascompared with the cross sectional area of the piston rod 1 and that therear of the cylinder 6' opens into the discharge chamber, makes thispump of Figure 4 double acting. The forward piston movement (to the leftin Figure 4) permits half as 'much liquid to .crowd into the spacebehind the piston as is pumped by thepiston. The excess one-half isdriven out of the discharge on this forward stroke and the other half(that back of the pis- V ,ton) is driven out through the discharge onthe back stroke.

The operation of the two double acting pumps of the figures will beevident to anyone skilled in the art.

In view of my invention and disclosure variations and modifications tomeet individual whim or particular need will doubtless become evident toothers skilled in the art, to obtain all or part of the benefits of myinvention without copying the structure shown, and I, therefore, claimall such in so far as they fall within the reasonablespirit and scope ofmy invention.

Having thus described .my invention what-I claim as new and desire tosecure by Letters Patent is:

l. A pump including a cylinder block and a cylinder head therefor, bothhaving cooperating circumferential grooves, the groovesbeing-of onesmaller size in two circumferentially opposite clamping parts of thegroove and relatively enlarged at two opposite but intermediate parts.and having inlet and outlet ports at the enlarged parts, and elasticport closures of diameter larger than that of the smaller groovesclamped at the smaller size clamping parts of the groove between theblock and head.

- 2. In a pump, a pump cylinder block having an outlet cylinder port atan end of the cylinder, walls forming an inlet compartment adjacent theend of the cylinder, the compartment having an outwardly directed inlet.port which with a passage connects the compartment with the interior ofthe cylinder, an elastic ring engaging both ports outside of the portsand means common to the cylinder block and the end of the cylinder forsealing engaging the ring at points clrcumferentially between the pointsof engagement with the outlet and inlet ports.

3. In a. pump, a pump cylinder block, a piston in the cylinder, meansfor operating the piston, separate cylinder heads at opposite ends ofthe cylinder, the cylinder block and the cylinder head havingcooperating grooves eccentrically positioned about the cylinder, inletand outlet ports at each end at opposite sides of the cylinder, facingoutwardly from the cylinder, respectively, and a rubber ring normallyclosing both ports, the ring being gripped by the walls of the groovesbetween the cylinder block and cylinder head.

4. In a pump, a cylinder block having outwardly directed outlet ports atopposite ends, a piston within the block, walls forming a passageoutside the cylinder for inlet liquid, outwardly directed ports from thepassage and at opposite ends of the cylindencylinder heads at oppositeends of the cylinder each containing an inlet passage into the cylinder,rubber rings, one at each end adapted to surround the cylinder and eachto engage the outer ends of the outwardly directed ports and clampingmeans for sealing each of said rings against leakage following the ringsfrom outlet to inlet port-engaging parts thereof.

5. In a pump, a pump cylinder block and head having an outwardlydirected discharge port, walls forming an inlet passage extendinglongitudinally of the cylinder, surge connections in the walls of theinlet, the passage walls forming a cylinder inlet port and extendingoutwardly from the inlet passage, the inlet port being connected withthe end of the cylinder, and a resilient outwardly opening ring closurefor the outwardly directed ports, the cylinder block and cylinder headbeing divided at the ports and parts of the ports appearing each in theblock and head.

6. In a pump, a cylinder block having a cylinder, a cylinder head, arubber ring clamped between the head and cylinder block and eccentric tothe cylinder and walls forming inlet and outlet ports opening outwardlyand located between the cylinder block and head and both closed by thering.

7. In a-double acting pump, a cylinder block having a cylinder, cylinderheads, one at each end thereof, rubber rings eccentric to the cylinder,one at each end of the cylinder block between the cylinder block andadjacent cylinder head and walls forming inlet and outlet ports bothopening outwardly at each end of the cylinder between the cylinder blockand adjacent cylinder head and both closed by the adjacent ring.

Y'YWARREN P. VALENTINE.

